8th graders continue working with geometry in Chapter 8, Geometry and Measurement. This past week we learned about congruent figures, especially triangles and ways to prove that they are congruent. If all three sides of one triangle are congruent to all three sides of another triangle the two triangles are congruent (SSS). Two other ways to prove congruency is ASA (angle side angle) and SAS (side angle side). It is sometimes challenging to find the angles and sides that we know are congruent. 8th graders also reviewed the different ways to classify a triangle; by the sides (equilateral, isosceles, scalene) and by the angles (acute, obtuse, right). We also reviewed the special names given to quadrilaterals (trapezoid, parallelogram, rhombus, rectangle, and square). After reviewing the names for different sided polygons (triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, dodecagon) we learned how to calculate the sum of the interior angles of each polygon and to find the measure of an angle in a regular polygon. We will continue to work on Chapter 8 for the next couple of weeks, using formulas to calculate the area, surface area, and volume of different shapes.
Have a blessed Holy Week and Easter with family and friends.
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